PRN     Azimuth(d)     Elevation(d)   Vertical-TEC(tecu)    Slant-TEC(tecu)       S4(L1/L2)    2018/01/21-04:28:00
G01     46.3           22.3                4.6 +/-    0.91       9.6 +/-    0.91  0.040 / 0.060
G06     179.3          27.5                7.1 +/-    1.19      13.2 +/-    1.19  0.050 / 0.070
G11     44.1           12.2                3.8 +/-    2.25      10.1 +/-    2.25  0.080 / 0.300
G13     246.4          27.4                5.7 +/-    1.41      10.5 +/-    1.41  0.070 / 0.290
G15     277.9          15.0                4.5 +/-    1.64      11.1 +/-    1.64  0.030 / 0.030
G17     336.2          76.4                7.1 +/-    0.40       7.2 +/-    0.40  0.030 / 0.030
G19     257.5          64.8                5.1 +/-    0.76       5.6 +/-    0.76  0.160 / 0.380
G24     318.8          11.4               -6.3 +/-   24.74     -17.0 +/-   24.74  0.140 / 0.360
G28     60.9           50.3                5.4 +/-    0.55       6.8 +/-    0.55  0.110 / 0.130
G30     150.9          32.9                8.7 +/-    1.47      14.4 +/-    1.47  0.100 / 0.110